libbinder_rs: Add support for attributes to declare_binder_enum

Enums can be deprecated in AIDL. In order to support this, the
declare_binder_enum macro needs to support adding attributes to the
declared enum inside the macro.

Test: atest rustBinderTest
Bug: 177860423
Change-Id: I6f210f02b45b4647d65e93c3333f25afc1bd06c3